1、Constructed of high-strength machined 6061 aluminum alloy. 2、Suitable for mountain bicycle to rise up the handlebar fork stem. 3、Can freely adjust the gasket to fit your own height. 4、Can extend the fork stem maximumly, especially for long-distance ride. 5、Easy installation, just connect up the original front fork stem. Features: Constructed of high-strength machined 6061 aluminum alloy. Suitable for mountain bicycle to rise up the handlebar fork stem. Can freely adjust the gasket to fit your own height. Can extend the fork stem maximumly, especially for long-distance ride. Easy installation, just connect up the original front fork stem. Specification: Condition: 100% Brand New and High Quality Color: black, red, blue, gold, silver (optional) Material: aluminum alloy Length: approx. 12cm / 4.7in Base diameter: 31.8mm Fork stem diameter: 28.6mm Weight: Approx. 187g Package List: 1 Set x Bicycle riser stem (bicycles are props in picture) Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.